These methods were fantastic!! I just tried them now and got the Quick and Everyone Else and my partner got both (already had the other trophy legit).

A few tips to make it a hassle free method:

*Keep joining a new free roam world until there's only 1 or no person in that world.
*Make sure you're not in a posse when going for the Go Team trophy.
*Always keep the number of players screen up so you can quickly kick anyone who joins.
*Try to go for the trophy when there's less people online (i.e. weekdays afternoon or very early morning).

I tried this method earlier and it didn't work out due to people joining when the other had exited the game so me and my boosting partner ended up playing grab the bag and goldrush, it did take longer but due to us both having comms and never being left alone we managed to kick everyone who joined very quickly, whoever was getting the trophy just grabbed the bags and won the game.

Yes it took longer but it did not leave much to chance and was IMO the better method. We both got our trophies without having to replay/retry and as we both had comms we had a good chat about nothing in particular which helped pass the time.

__________________PSN = Mojo_666

If you want to boost have a MicBoosting without a Mic is like washing without soap!

I got these trophies last night - many thanks to the op for posting the method! I just have some observations to add to the above:

1. At one point my buddy couldn't rejoin my lobby due to some error message (he didn't quote it, sorry). But when I started a new one it worked fine.

2. You have to be *really* quick with the kicks. We found grab the bag matches to be less popular.

3. Halfway through our Go Team run a bunch of people turned up simultaneously, too many to kick. My buddy (he was going for the trophy) and I were placed on opposite teams so I just sprinted around getting killed as much as possible so that his team won.

Jesus i love this method but if it's easy to fail, it gets really frustrating when you partner up with somebody doing it half-assed too.

In order, be sure to tell your partner to:
1) Accept your invites fast (you should send them during the score page of the match, you have 20 seconds), he should be active well before the 45 seconds before the match starts once a stranger selects 'Start the game'.
2) To press 'Start now' immediatly if there aren't other players instead of running around letting the 45 seconds pass makng it easier for other people to join
3) Send the second kick vote immediatly
4) Check if there are other players before leaving. In case this happens you can invite him back in and have him help you kick the third guy, if you are lucky enough that nobody else joins.